2 via686a.c - Part of lm_sensors, Linux kernel modules
3 for hardware monitoring
5 Copyright (c) 1998 - 2002 Frodo Looijaard <frodol@dds.nl>,
6 Kyösti Mälkki <kmalkki@cc.hut.fi>,
7 Mark Studebaker <mdsxyz123@yahoo.com>,
8 and Bob Dougherty <bobd@stanford.edu>
9 (Some conversion-factor data were contributed by Jonathan Teh Soon Yew
10 <j.teh@iname.com> and Alex van Kaam <darkside@chello.nl>.)
12 This program is free software; you can redistribute it and/or modify
13 it under the terms of the GNU General Public License as published by
14 the Free Software Foundation; either version 2 of the License, or
15 (at your option) any later version.
17 This program is distributed in the hope that it will be useful,
18 but WITHOUT ANY WARRANTY; without even the implied warranty of
19 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 GNU General Public License for more details.
22 You should have received a copy of the GNU General Public License
23 along with this program; if not, write to the Free Software
24 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
28 Supports the Via VT82C686A, VT82C686B south bridges.
29 Reports all as a 686A.
30 Warning - only supports a single device.
33 #include <linux/module.h>
34 #include <linux/slab.h>
35 #include <linux/pci.h>
36 #include <linux/jiffies.h>
37 #include <linux/platform_device.h>
38 #include <linux/hwmon.h>
39 #include <linux/err.h>
40 #include <linux/init.h>
41 #include <linux/mutex.h>
42 #include <linux/sysfs.h>
46 /* If force_addr is set to anything different from 0, we forcibly enable
47 the device at the given address. */
48 static unsigned short force_addr;
49 module_param(force_addr, ushort, 0);
50 MODULE_PARM_DESC(force_addr,
51 "Initialize the base address of the sensors");
53 static struct platform_device *pdev;
56 The Via 686a southbridge has a LM78-like chip integrated on the same IC.
57 This driver is a customized copy of lm78.c
60 /* Many VIA686A constants specified below */
62 /* Length of ISA address segment */
63 #define VIA686A_EXTENT 0x80
64 #define VIA686A_BASE_REG 0x70
65 #define VIA686A_ENABLE_REG 0x74
67 /* The VIA686A registers */
68 /* ins numbered 0-4 */
69 #define VIA686A_REG_IN_MAX(nr) (0x2b + ((nr) * 2))
70 #define VIA686A_REG_IN_MIN(nr) (0x2c + ((nr) * 2))
71 #define VIA686A_REG_IN(nr) (0x22 + (nr))
73 /* fans numbered 1-2 */
74 #define VIA686A_REG_FAN_MIN(nr) (0x3a + (nr))
75 #define VIA686A_REG_FAN(nr) (0x28 + (nr))
77 /* temps numbered 1-3 */
78 static const u8 VIA686A_REG_TEMP[] = { 0x20, 0x21, 0x1f };
79 static const u8 VIA686A_REG_TEMP_OVER[] = { 0x39, 0x3d, 0x1d };
80 static const u8 VIA686A_REG_TEMP_HYST[] = { 0x3a, 0x3e, 0x1e };
82 #define VIA686A_REG_TEMP_LOW1 0x4b
83 /* 2 = bits 5-4, 3 = bits 7-6 */
84 #define VIA686A_REG_TEMP_LOW23 0x49
86 #define VIA686A_REG_ALARM1 0x41
87 #define VIA686A_REG_ALARM2 0x42
88 #define VIA686A_REG_FANDIV 0x47
89 #define VIA686A_REG_CONFIG 0x40
90 /* The following register sets temp interrupt mode (bits 1-0 for temp1,
91 3-2 for temp2, 5-4 for temp3). Modes are:
92 00 interrupt stays as long as value is out-of-range
93 01 interrupt is cleared once register is read (default)
94 10 comparator mode- like 00, but ignores hysteresis
96 #define VIA686A_REG_TEMP_MODE 0x4b
97 /* We'll just assume that you want to set all 3 simultaneously: */
98 #define VIA686A_TEMP_MODE_MASK 0x3F
99 #define VIA686A_TEMP_MODE_CONTINUOUS 0x00
101 /* Conversions. Limit checking is only done on the TO_REG
104 ********* VOLTAGE CONVERSIONS (Bob Dougherty) ********
105 From HWMon.cpp (Copyright 1998-2000 Jonathan Teh Soon Yew):
106 voltagefactor[0]=1.25/2628; (2628/1.25=2102.4) // Vccp
107 voltagefactor[1]=1.25/2628; (2628/1.25=2102.4) // +2.5V
108 voltagefactor[2]=1.67/2628; (2628/1.67=1573.7) // +3.3V
109 voltagefactor[3]=2.6/2628; (2628/2.60=1010.8) // +5V
110 voltagefactor[4]=6.3/2628; (2628/6.30=417.14) // +12V
111 in[i]=(data[i+2]*25.0+133)*voltagefactor[i];
113 volts = (25*regVal+133)*factor
114 regVal = (volts/factor-133)/25
115 (These conversions were contributed by Jonathan Teh Soon Yew
116 <j.teh@iname.com>) */
117 static inline u8 IN_TO_REG(long val, int inNum)
119 /* To avoid floating point, we multiply constants by 10 (100 for +12V).
120 Rounding is done (120500 is actually 133000 - 12500).
121 Remember that val is expressed in 0.001V/bit, which is why we divide
122 by an additional 10000 (100000 for +12V): 1000 for val and 10 (100)
123 for the constants. */
126 SENSORS_LIMIT((val * 21024 - 1205000) / 250000, 0, 255);
129 SENSORS_LIMIT((val * 15737 - 1205000) / 250000, 0, 255);
132 SENSORS_LIMIT((val * 10108 - 1205000) / 250000, 0, 255);
135 SENSORS_LIMIT((val * 41714 - 12050000) / 2500000, 0, 255);
138 static inline long IN_FROM_REG(u8 val, int inNum)
140 /* To avoid floating point, we multiply constants by 10 (100 for +12V).
141 We also multiply them by 1000 because we want 0.001V/bit for the
142 output value. Rounding is done. */
144 return (long) ((250000 * val + 1330000 + 21024 / 2) / 21024);
146 return (long) ((250000 * val + 1330000 + 15737 / 2) / 15737);
148 return (long) ((250000 * val + 1330000 + 10108 / 2) / 10108);
150 return (long) ((2500000 * val + 13300000 + 41714 / 2) / 41714);
153 /********* FAN RPM CONVERSIONS ********/
154 /* Higher register values = slower fans (the fan's strobe gates a counter).
155 But this chip saturates back at 0, not at 255 like all the other chips.
157 static inline u8 FAN_TO_REG(long rpm, int div)
161 rpm = SENSORS_LIMIT(rpm, 1, 1000000);
162 return SENSORS_LIMIT((1350000 + rpm * div / 2) / (rpm * div), 1, 255);
165 #define FAN_FROM_REG(val,div) ((val)==0?0:(val)==255?0:1350000/((val)*(div)))
167 /******** TEMP CONVERSIONS (Bob Dougherty) *********/
168 /* linear fits from HWMon.cpp (Copyright 1998-2000 Jonathan Teh Soon Yew)
170 return double(temp)*0.427-32.08;
171 else if(temp>=169 && temp<=202)
172 return double(temp)*0.582-58.16;
174 return double(temp)*0.924-127.33;
176 A fifth-order polynomial fits the unofficial data (provided by Alex van
177 Kaam <darkside@chello.nl>) a bit better. It also give more reasonable
178 numbers on my machine (ie. they agree with what my BIOS tells me).
179 Here's the fifth-order fit to the 8-bit data:
180 temp = 1.625093e-10*val^5 - 1.001632e-07*val^4 + 2.457653e-05*val^3 -
181 2.967619e-03*val^2 + 2.175144e-01*val - 7.090067e+0.
183 (2000-10-25- RFD: thanks to Uwe Andersen <uandersen@mayah.com> for
184 finding my typos in this formula!)
186 Alas, none of the elegant function-fit solutions will work because we
187 aren't allowed to use floating point in the kernel and doing it with
188 integers doesn't provide enough precision. So we'll do boring old
189 look-up table stuff. The unofficial data (see below) have effectively
190 7-bit resolution (they are rounded to the nearest degree). I'm assuming
191 that the transfer function of the device is monotonic and smooth, so a
192 smooth function fit to the data will allow us to get better precision.
193 I used the 5th-order poly fit described above and solved for
194 VIA register values 0-255. I *10 before rounding, so we get tenth-degree
195 precision. (I could have done all 1024 values for our 10-bit readings,
196 but the function is very linear in the useful range (0-80 deg C), so
197 we'll just use linear interpolation for 10-bit readings.) So, tempLUT
198 is the temp at via register values 0-255: */
199 static const s16 tempLUT[] =
200 { -709, -688, -667, -646, -627, -607, -589, -570, -553, -536, -519,
201 -503, -487, -471, -456, -442, -428, -414, -400, -387, -375,
202 -362, -350, -339, -327, -316, -305, -295, -285, -275, -265,
203 -255, -246, -237, -229, -220, -212, -204, -196, -188, -180,
204 -173, -166, -159, -152, -145, -139, -132, -126, -120, -114,
205 -108, -102, -96, -91, -85, -80, -74, -69, -64, -59, -54, -49,
206 -44, -39, -34, -29, -25, -20, -15, -11, -6, -2, 3, 7, 12, 16,
207 20, 25, 29, 33, 37, 42, 46, 50, 54, 59, 63, 67, 71, 75, 79, 84,
208 88, 92, 96, 100, 104, 109, 113, 117, 121, 125, 130, 134, 138,
209 142, 146, 151, 155, 159, 163, 168, 172, 176, 181, 185, 189,
210 193, 198, 202, 206, 211, 215, 219, 224, 228, 232, 237, 241,
211 245, 250, 254, 259, 263, 267, 272, 276, 281, 285, 290, 294,
212 299, 303, 307, 312, 316, 321, 325, 330, 334, 339, 344, 348,
213 353, 357, 362, 366, 371, 376, 380, 385, 390, 395, 399, 404,
214 409, 414, 419, 423, 428, 433, 438, 443, 449, 454, 459, 464,
215 469, 475, 480, 486, 491, 497, 502, 508, 514, 520, 526, 532,
216 538, 544, 551, 557, 564, 571, 578, 584, 592, 599, 606, 614,
217 621, 629, 637, 645, 654, 662, 671, 680, 689, 698, 708, 718,
218 728, 738, 749, 759, 770, 782, 793, 805, 818, 830, 843, 856,
219 870, 883, 898, 912, 927, 943, 958, 975, 991, 1008, 1026, 1044,
220 1062, 1081, 1101, 1121, 1141, 1162, 1184, 1206, 1229, 1252,
221 1276, 1301, 1326, 1352, 1378, 1406, 1434, 1462
224 /* the original LUT values from Alex van Kaam <darkside@chello.nl>
225 (for via register values 12-240):
226 {-50,-49,-47,-45,-43,-41,-39,-38,-37,-35,-34,-33,-32,-31,
227 -30,-29,-28,-27,-26,-25,-24,-24,-23,-22,-21,-20,-20,-19,-18,-17,-17,-16,-15,
228 -15,-14,-14,-13,-12,-12,-11,-11,-10,-9,-9,-8,-8,-7,-7,-6,-6,-5,-5,-4,-4,-3,
229 -3,-2,-2,-1,-1,0,0,1,1,1,3,3,3,4,4,4,5,5,5,6,6,7,7,8,8,9,9,9,10,10,11,11,12,
230 12,12,13,13,13,14,14,15,15,16,16,16,17,17,18,18,19,19,20,20,21,21,21,22,22,
231 22,23,23,24,24,25,25,26,26,26,27,27,27,28,28,29,29,30,30,30,31,31,32,32,33,
232 33,34,34,35,35,35,36,36,37,37,38,38,39,39,40,40,41,41,42,42,43,43,44,44,45,
233 45,46,46,47,48,48,49,49,50,51,51,52,52,53,53,54,55,55,56,57,57,58,59,59,60,
234 61,62,62,63,64,65,66,66,67,68,69,70,71,72,73,74,75,76,77,78,79,80,81,83,84,
235 85,86,88,89,91,92,94,96,97,99,101,103,105,107,109,110};
238 Here's the reverse LUT. I got it by doing a 6-th order poly fit (needed
239 an extra term for a good fit to these inverse data!) and then
240 solving for each temp value from -50 to 110 (the useable range for
241 this chip). Here's the fit:
242 viaRegVal = -1.160370e-10*val^6 +3.193693e-08*val^5 - 1.464447e-06*val^4
243 - 2.525453e-04*val^3 + 1.424593e-02*val^2 + 2.148941e+00*val +7.275808e+01)
245 static const u8 viaLUT[] =
246 { 12, 12, 13, 14, 14, 15, 16, 16, 17, 18, 18, 19, 20, 20, 21, 22, 23,
247 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 35, 36, 37, 39, 40,
248 41, 43, 45, 46, 48, 49, 51, 53, 55, 57, 59, 60, 62, 64, 66,
249 69, 71, 73, 75, 77, 79, 82, 84, 86, 88, 91, 93, 95, 98, 100,
250 103, 105, 107, 110, 112, 115, 117, 119, 122, 124, 126, 129,
251 131, 134, 136, 138, 140, 143, 145, 147, 150, 152, 154, 156,
252 158, 160, 162, 164, 166, 168, 170, 172, 174, 176, 178, 180,
253 182, 183, 185, 187, 188, 190, 192, 193, 195, 196, 198, 199,
254 200, 202, 203, 205, 206, 207, 208, 209, 210, 211, 212, 213,
255 214, 215, 216, 217, 218, 219, 220, 221, 222, 222, 223, 224,
256 225, 226, 226, 227, 228, 228, 229, 230, 230, 231, 232, 232,
257 233, 233, 234, 235, 235, 236, 236, 237, 237, 238, 238, 239,
261 /* Converting temps to (8-bit) hyst and over registers
262 No interpolation here.
263 The +50 is because the temps start at -50 */
264 static inline u8 TEMP_TO_REG(long val)
266 return viaLUT[val <= -50000 ? 0 : val >= 110000 ? 160 :
267 (val < 0 ? val - 500 : val + 500) / 1000 + 50];
270 /* for 8-bit temperature hyst and over registers */
271 #define TEMP_FROM_REG(val) ((long)tempLUT[val] * 100)
273 /* for 10-bit temperature readings */
274 static inline long TEMP_FROM_REG10(u16 val)
276 u16 eightBits = val >> 2;
277 u16 twoBits = val & 3;
279 /* no interpolation for these */
280 if (twoBits == 0 || eightBits == 255)
281 return TEMP_FROM_REG(eightBits);
283 /* do some linear interpolation */
284 return (tempLUT[eightBits] * (4 - twoBits) +
285 tempLUT[eightBits + 1] * twoBits) * 25;
288 #define DIV_FROM_REG(val) (1 << (val))
289 #define DIV_TO_REG(val) ((val)==8?3:(val)==4?2:(val)==1?0:1)
291 /* For each registered chip, we need to keep some data in memory.
292 The structure is dynamically allocated. */
293 struct via686a_data {
296 struct class_device *class_dev;
297 struct mutex update_lock;
298 char valid; /* !=0 if following fields are valid */
299 unsigned long last_updated; /* In jiffies */
301 u8 in[5]; /* Register value */
302 u8 in_max[5]; /* Register value */
303 u8 in_min[5]; /* Register value */
304 u8 fan[2]; /* Register value */
305 u8 fan_min[2]; /* Register value */
306 u16 temp[3]; /* Register value 10 bit */
307 u8 temp_over[3]; /* Register value */
308 u8 temp_hyst[3]; /* Register value */
309 u8 fan_div[2]; /* Register encoding, shifted right */
310 u16 alarms; /* Register encoding, combined */
313 static struct pci_dev *s_bridge; /* pointer to the (only) via686a */
315 static int via686a_probe(struct platform_device *pdev);
316 static int via686a_remove(struct platform_device *pdev);
318 static inline int via686a_read_value(struct via686a_data *data, u8 reg)
320 return inb_p(data->addr + reg);
323 static inline void via686a_write_value(struct via686a_data *data, u8 reg,
326 outb_p(value, data->addr + reg);
329 static struct via686a_data *via686a_update_device(struct device *dev);
330 static void via686a_init_device(struct via686a_data *data);
332 /* following are the sysfs callback functions */
334 /* 7 voltage sensors */
335 static ssize_t show_in(struct device *dev, char *buf, int nr) {
336 struct via686a_data *data = via686a_update_device(dev);
337 return sprintf(buf, "%ld\n", IN_FROM_REG(data->in[nr], nr));
340 static ssize_t show_in_min(struct device *dev, char *buf, int nr) {
341 struct via686a_data *data = via686a_update_device(dev);
342 return sprintf(buf, "%ld\n", IN_FROM_REG(data->in_min[nr], nr));
345 static ssize_t show_in_max(struct device *dev, char *buf, int nr) {
346 struct via686a_data *data = via686a_update_device(dev);
347 return sprintf(buf, "%ld\n", IN_FROM_REG(data->in_max[nr], nr));
350 static ssize_t set_in_min(struct device *dev, const char *buf,
351 size_t count, int nr) {
352 struct via686a_data *data = dev_get_drvdata(dev);
353 unsigned long val = simple_strtoul(buf, NULL, 10);
355 mutex_lock(&data->update_lock);
356 data->in_min[nr] = IN_TO_REG(val, nr);
357 via686a_write_value(data, VIA686A_REG_IN_MIN(nr),
359 mutex_unlock(&data->update_lock);
362 static ssize_t set_in_max(struct device *dev, const char *buf,
363 size_t count, int nr) {
364 struct via686a_data *data = dev_get_drvdata(dev);
365 unsigned long val = simple_strtoul(buf, NULL, 10);
367 mutex_lock(&data->update_lock);
368 data->in_max[nr] = IN_TO_REG(val, nr);
369 via686a_write_value(data, VIA686A_REG_IN_MAX(nr),
371 mutex_unlock(&data->update_lock);
374 #define show_in_offset(offset) \
376 show_in##offset (struct device *dev, struct device_attribute *attr, char *buf) \
378 return show_in(dev, buf, offset); \
381 show_in##offset##_min (struct device *dev, struct device_attribute *attr, char *buf) \
383 return show_in_min(dev, buf, offset); \
386 show_in##offset##_max (struct device *dev, struct device_attribute *attr, char *buf) \
388 return show_in_max(dev, buf, offset); \
390 static ssize_t set_in##offset##_min (struct device *dev, struct device_attribute *attr, \
391 const char *buf, size_t count) \
393 return set_in_min(dev, buf, count, offset); \
395 static ssize_t set_in##offset##_max (struct device *dev, struct device_attribute *attr, \
396 const char *buf, size_t count) \
398 return set_in_max(dev, buf, count, offset); \
400 static DEVICE_ATTR(in##offset##_input, S_IRUGO, show_in##offset, NULL);\
401 static DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR, \
402 show_in##offset##_min, set_in##offset##_min); \
403 static DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR, \
404 show_in##offset##_max, set_in##offset##_max);
413 static ssize_t show_temp(struct device *dev, char *buf, int nr) {
414 struct via686a_data *data = via686a_update_device(dev);
415 return sprintf(buf, "%ld\n", TEMP_FROM_REG10(data->temp[nr]));
417 static ssize_t show_temp_over(struct device *dev, char *buf, int nr) {
418 struct via686a_data *data = via686a_update_device(dev);
419 return sprintf(buf, "%ld\n", TEMP_FROM_REG(data->temp_over[nr]));
421 static ssize_t show_temp_hyst(struct device *dev, char *buf, int nr) {
422 struct via686a_data *data = via686a_update_device(dev);
423 return sprintf(buf, "%ld\n", TEMP_FROM_REG(data->temp_hyst[nr]));
425 static ssize_t set_temp_over(struct device *dev, const char *buf,
426 size_t count, int nr) {
427 struct via686a_data *data = dev_get_drvdata(dev);
428 int val = simple_strtol(buf, NULL, 10);
430 mutex_lock(&data->update_lock);
431 data->temp_over[nr] = TEMP_TO_REG(val);
432 via686a_write_value(data, VIA686A_REG_TEMP_OVER[nr],
433 data->temp_over[nr]);
434 mutex_unlock(&data->update_lock);
437 static ssize_t set_temp_hyst(struct device *dev, const char *buf,
438 size_t count, int nr) {
439 struct via686a_data *data = dev_get_drvdata(dev);
440 int val = simple_strtol(buf, NULL, 10);
442 mutex_lock(&data->update_lock);
443 data->temp_hyst[nr] = TEMP_TO_REG(val);
444 via686a_write_value(data, VIA686A_REG_TEMP_HYST[nr],
445 data->temp_hyst[nr]);
446 mutex_unlock(&data->update_lock);
449 #define show_temp_offset(offset) \
450 static ssize_t show_temp_##offset (struct device *dev, struct device_attribute *attr, char *buf) \
452 return show_temp(dev, buf, offset - 1); \
455 show_temp_##offset##_over (struct device *dev, struct device_attribute *attr, char *buf) \
457 return show_temp_over(dev, buf, offset - 1); \
460 show_temp_##offset##_hyst (struct device *dev, struct device_attribute *attr, char *buf) \
462 return show_temp_hyst(dev, buf, offset - 1); \
464 static ssize_t set_temp_##offset##_over (struct device *dev, struct device_attribute *attr, \
465 const char *buf, size_t count) \
467 return set_temp_over(dev, buf, count, offset - 1); \
469 static ssize_t set_temp_##offset##_hyst (struct device *dev, struct device_attribute *attr, \
470 const char *buf, size_t count) \
472 return set_temp_hyst(dev, buf, count, offset - 1); \
474 static DEVICE_ATTR(temp##offset##_input, S_IRUGO, show_temp_##offset, NULL);\
475 static DEVICE_ATTR(temp##offset##_max, S_IRUGO | S_IWUSR, \
476 show_temp_##offset##_over, set_temp_##offset##_over); \
477 static DEVICE_ATTR(temp##offset##_max_hyst, S_IRUGO | S_IWUSR, \
478 show_temp_##offset##_hyst, set_temp_##offset##_hyst);
485 static ssize_t show_fan(struct device *dev, char *buf, int nr) {
486 struct via686a_data *data = via686a_update_device(dev);
487 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[nr],
488 DIV_FROM_REG(data->fan_div[nr])) );
490 static ssize_t show_fan_min(struct device *dev, char *buf, int nr) {
491 struct via686a_data *data = via686a_update_device(dev);
492 return sprintf(buf, "%d\n",
493 FAN_FROM_REG(data->fan_min[nr], DIV_FROM_REG(data->fan_div[nr])) );
495 static ssize_t show_fan_div(struct device *dev, char *buf, int nr) {
496 struct via686a_data *data = via686a_update_device(dev);
497 return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr]) );
499 static ssize_t set_fan_min(struct device *dev, const char *buf,
500 size_t count, int nr) {
501 struct via686a_data *data = dev_get_drvdata(dev);
502 int val = simple_strtol(buf, NULL, 10);
504 mutex_lock(&data->update_lock);
505 data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr]));
506 via686a_write_value(data, VIA686A_REG_FAN_MIN(nr+1), data->fan_min[nr]);
507 mutex_unlock(&data->update_lock);
510 static ssize_t set_fan_div(struct device *dev, const char *buf,
511 size_t count, int nr) {
512 struct via686a_data *data = dev_get_drvdata(dev);
513 int val = simple_strtol(buf, NULL, 10);
516 mutex_lock(&data->update_lock);
517 old = via686a_read_value(data, VIA686A_REG_FANDIV);
518 data->fan_div[nr] = DIV_TO_REG(val);
519 old = (old & 0x0f) | (data->fan_div[1] << 6) | (data->fan_div[0] << 4);
520 via686a_write_value(data, VIA686A_REG_FANDIV, old);
521 mutex_unlock(&data->update_lock);
525 #define show_fan_offset(offset) \
526 static ssize_t show_fan_##offset (struct device *dev, struct device_attribute *attr, char *buf) \
528 return show_fan(dev, buf, offset - 1); \
530 static ssize_t show_fan_##offset##_min (struct device *dev, struct device_attribute *attr, char *buf) \
532 return show_fan_min(dev, buf, offset - 1); \
534 static ssize_t show_fan_##offset##_div (struct device *dev, struct device_attribute *attr, char *buf) \
536 return show_fan_div(dev, buf, offset - 1); \
538 static ssize_t set_fan_##offset##_min (struct device *dev, struct device_attribute *attr, \
539 const char *buf, size_t count) \
541 return set_fan_min(dev, buf, count, offset - 1); \
543 static ssize_t set_fan_##offset##_div (struct device *dev, struct device_attribute *attr, \
544 const char *buf, size_t count) \
546 return set_fan_div(dev, buf, count, offset - 1); \
548 static DEVICE_ATTR(fan##offset##_input, S_IRUGO, show_fan_##offset, NULL);\
549 static DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \
550 show_fan_##offset##_min, set_fan_##offset##_min); \
551 static DEVICE_ATTR(fan##offset##_div, S_IRUGO | S_IWUSR, \
552 show_fan_##offset##_div, set_fan_##offset##_div);
558 static ssize_t show_alarms(struct device *dev, struct device_attribute *attr, char *buf) {
559 struct via686a_data *data = via686a_update_device(dev);
560 return sprintf(buf, "%u\n", data->alarms);
562 static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
564 static ssize_t show_name(struct device *dev, struct device_attribute
567 struct via686a_data *data = dev_get_drvdata(dev);
568 return sprintf(buf, "%s\n", data->name);
570 static DEVICE_ATTR(name, S_IRUGO, show_name, NULL);
572 static struct attribute *via686a_attributes[] = {
573 &dev_attr_in0_input.attr,
574 &dev_attr_in1_input.attr,
575 &dev_attr_in2_input.attr,
576 &dev_attr_in3_input.attr,
577 &dev_attr_in4_input.attr,
578 &dev_attr_in0_min.attr,
579 &dev_attr_in1_min.attr,
580 &dev_attr_in2_min.attr,
581 &dev_attr_in3_min.attr,
582 &dev_attr_in4_min.attr,
583 &dev_attr_in0_max.attr,
584 &dev_attr_in1_max.attr,
585 &dev_attr_in2_max.attr,
586 &dev_attr_in3_max.attr,
587 &dev_attr_in4_max.attr,
589 &dev_attr_temp1_input.attr,
590 &dev_attr_temp2_input.attr,
591 &dev_attr_temp3_input.attr,
592 &dev_attr_temp1_max.attr,
593 &dev_attr_temp2_max.attr,
594 &dev_attr_temp3_max.attr,
595 &dev_attr_temp1_max_hyst.attr,
596 &dev_attr_temp2_max_hyst.attr,
597 &dev_attr_temp3_max_hyst.attr,
599 &dev_attr_fan1_input.attr,
600 &dev_attr_fan2_input.attr,
601 &dev_attr_fan1_min.attr,
602 &dev_attr_fan2_min.attr,
603 &dev_attr_fan1_div.attr,
604 &dev_attr_fan2_div.attr,
606 &dev_attr_alarms.attr,
611 static const struct attribute_group via686a_group = {
612 .attrs = via686a_attributes,
615 static struct platform_driver via686a_driver = {
617 .owner = THIS_MODULE,
620 .probe = via686a_probe,
621 .remove = __devexit_p(via686a_remove),
625 /* This is called when the module is loaded */
626 static int __devinit via686a_probe(struct platform_device *pdev)
628 struct via686a_data *data;
629 struct resource *res;
632 /* Reserve the ISA region */
633 res = platform_get_resource(pdev, IORESOURCE_IO, 0);
634 if (!request_region(res->start, VIA686A_EXTENT,
635 via686a_driver.driver.name)) {
636 dev_err(&pdev->dev, "Region 0x%lx-0x%lx already in use!\n",
637 (unsigned long)res->start, (unsigned long)res->end);
641 if (!(data = kzalloc(sizeof(struct via686a_data), GFP_KERNEL))) {
646 platform_set_drvdata(pdev, data);
647 data->addr = res->start;
648 data->name = "via686a";
649 mutex_init(&data->update_lock);
651 /* Initialize the VIA686A chip */
652 via686a_init_device(data);
654 /* Register sysfs hooks */
655 if ((err = sysfs_create_group(&pdev->dev.kobj, &via686a_group)))
658 data->class_dev = hwmon_device_register(&pdev->dev);
659 if (IS_ERR(data->class_dev)) {
660 err = PTR_ERR(data->class_dev);
661 goto exit_remove_files;
667 sysfs_remove_group(&pdev->dev.kobj, &via686a_group);
671 release_region(res->start, VIA686A_EXTENT);
675 static int __devexit via686a_remove(struct platform_device *pdev)
677 struct via686a_data *data = platform_get_drvdata(pdev);
679 hwmon_device_unregister(data->class_dev);
680 sysfs_remove_group(&pdev->dev.kobj, &via686a_group);
682 release_region(data->addr, VIA686A_EXTENT);
683 platform_set_drvdata(pdev, NULL);
689 static void __devinit via686a_init_device(struct via686a_data *data)
693 /* Start monitoring */
694 reg = via686a_read_value(data, VIA686A_REG_CONFIG);
695 via686a_write_value(data, VIA686A_REG_CONFIG, (reg | 0x01) & 0x7F);
697 /* Configure temp interrupt mode for continuous-interrupt operation */
698 reg = via686a_read_value(data, VIA686A_REG_TEMP_MODE);
699 via686a_write_value(data, VIA686A_REG_TEMP_MODE,
700 (reg & ~VIA686A_TEMP_MODE_MASK)
701 | VIA686A_TEMP_MODE_CONTINUOUS);
704 static struct via686a_data *via686a_update_device(struct device *dev)
706 struct via686a_data *data = dev_get_drvdata(dev);
709 mutex_lock(&data->update_lock);
711 if (time_after(jiffies, data->last_updated + HZ + HZ / 2)
713 for (i = 0; i <= 4; i++) {
715 via686a_read_value(data, VIA686A_REG_IN(i));
716 data->in_min[i] = via686a_read_value(data,
720 via686a_read_value(data, VIA686A_REG_IN_MAX(i));
722 for (i = 1; i <= 2; i++) {
724 via686a_read_value(data, VIA686A_REG_FAN(i));
725 data->fan_min[i - 1] = via686a_read_value(data,
726 VIA686A_REG_FAN_MIN(i));
728 for (i = 0; i <= 2; i++) {
729 data->temp[i] = via686a_read_value(data,
730 VIA686A_REG_TEMP[i]) << 2;
732 via686a_read_value(data,
733 VIA686A_REG_TEMP_OVER[i]);
735 via686a_read_value(data,
736 VIA686A_REG_TEMP_HYST[i]);
738 /* add in lower 2 bits
739 temp1 uses bits 7-6 of VIA686A_REG_TEMP_LOW1
740 temp2 uses bits 5-4 of VIA686A_REG_TEMP_LOW23
741 temp3 uses bits 7-6 of VIA686A_REG_TEMP_LOW23
743 data->temp[0] |= (via686a_read_value(data,
744 VIA686A_REG_TEMP_LOW1)
747 (via686a_read_value(data, VIA686A_REG_TEMP_LOW23) &
750 (via686a_read_value(data, VIA686A_REG_TEMP_LOW23) &
753 i = via686a_read_value(data, VIA686A_REG_FANDIV);
754 data->fan_div[0] = (i >> 4) & 0x03;
755 data->fan_div[1] = i >> 6;
757 via686a_read_value(data,
758 VIA686A_REG_ALARM1) |
759 (via686a_read_value(data, VIA686A_REG_ALARM2) << 8);
760 data->last_updated = jiffies;
764 mutex_unlock(&data->update_lock);
769 static struct pci_device_id via686a_pci_ids[] = {
770 { PCI_DEVICE(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_82C686_4) },
774 MODULE_DEVICE_TABLE(pci, via686a_pci_ids);
776 static int __devinit via686a_device_add(unsigned short address)
778 struct resource res = {
780 .end = address + VIA686A_EXTENT - 1,
782 .flags = IORESOURCE_IO,
786 pdev = platform_device_alloc("via686a", address);
789 printk(KERN_ERR "via686a: Device allocation failed\n");
793 err = platform_device_add_resources(pdev, &res, 1);
795 printk(KERN_ERR "via686a: Device resource addition failed "
797 goto exit_device_put;
800 err = platform_device_add(pdev);
802 printk(KERN_ERR "via686a: Device addition failed (%d)\n",
804 goto exit_device_put;
810 platform_device_put(pdev);
815 static int __devinit via686a_pci_probe(struct pci_dev *dev,
816 const struct pci_device_id *id)
821 address = force_addr & ~(VIA686A_EXTENT - 1);
822 dev_warn(&dev->dev, "Forcing ISA address 0x%x\n", address);
823 if (PCIBIOS_SUCCESSFUL !=
824 pci_write_config_word(dev, VIA686A_BASE_REG, address | 1))
827 if (PCIBIOS_SUCCESSFUL !=
828 pci_read_config_word(dev, VIA686A_BASE_REG, &val))
831 address = val & ~(VIA686A_EXTENT - 1);
833 dev_err(&dev->dev, "base address not set - upgrade BIOS "
834 "or use force_addr=0xaddr\n");
838 if (PCIBIOS_SUCCESSFUL !=
839 pci_read_config_word(dev, VIA686A_ENABLE_REG, &val))
841 if (!(val & 0x0001)) {
843 dev_warn(&dev->dev, "Sensors disabled, enable "
844 "with force_addr=0x%x\n", address);
848 dev_warn(&dev->dev, "Enabling sensors\n");
849 if (PCIBIOS_SUCCESSFUL !=
850 pci_write_config_word(dev, VIA686A_ENABLE_REG,
855 if (platform_driver_register(&via686a_driver))
858 /* Sets global pdev as a side effect */
859 if (via686a_device_add(address))
860 goto exit_unregister;
862 /* Always return failure here. This is to allow other drivers to bind
863 * to this pci device. We don't really want to have control over the
864 * pci device, we only wanted to read as few register values from it.
866 s_bridge = pci_dev_get(dev);
870 platform_driver_unregister(&via686a_driver);
875 static struct pci_driver via686a_pci_driver = {
877 .id_table = via686a_pci_ids,
878 .probe = via686a_pci_probe,
881 static int __init sm_via686a_init(void)
883 return pci_register_driver(&via686a_pci_driver);
886 static void __exit sm_via686a_exit(void)
888 pci_unregister_driver(&via686a_pci_driver);
889 if (s_bridge != NULL) {
890 platform_device_unregister(pdev);
891 platform_driver_unregister(&via686a_driver);
892 pci_dev_put(s_bridge);
897 MODULE_AUTHOR("Kyösti Mälkki <kmalkki@cc.hut.fi>, "
898 "Mark Studebaker <mdsxyz123@yahoo.com> "
899 "and Bob Dougherty <bobd@stanford.edu>");
900 MODULE_DESCRIPTION("VIA 686A Sensor device");
901 MODULE_LICENSE("GPL");
903 module_init(sm_via686a_init);
904 module_exit(sm_via686a_exit);